package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import lombok.var;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * 菜品业务层
 */
@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);

        Long id = dish.getId();

        List<DishFlavor> dishFlavorList = dishDTO.getFlavors();
        if (dishFlavorList != null && dishFlavorList.size() > 0) {
            dishFlavorList.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });
            dishFlavorMapper.insert(dishFlavorList);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品启用禁用
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder().id(id).status(status).build();
        dishMapper.update(dish);
    }

    /**
     * 删除菜品
     * @param ids
     */
    @Transactional
    public void delete(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.query(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        dishMapper.delete(ids);
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据ID查询菜品
     * @param id
     * @return
     */
    public DishVO getById(Long id) {
        Dish dish = dishMapper.query(id);
        List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavor);
        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Transactional
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        if(dishDTO.getFlavors() != null && dishDTO.getFlavors().size() > 0) {
            for (DishFlavor dishFlavor : dishDTO.getFlavors()) {
                dishFlavor.setDishId(dishDTO.getId());

            }
            dishFlavorMapper.insert(dishDTO.getFlavors());
        }
    }

    /**
     * 根据分类查询菜品
     * @param categoryId
     * @return
     */
    public List<DishVO> getByCategoryId(Long categoryId) {
        List<Dish> Dishes = dishMapper.getByCategoryId(categoryId);
        List<DishVO> dishVOS = new ArrayList<>();
        for (Dish dish : Dishes) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(dish, dishVO);
            dishVOS.add(dishVO);
        }
        return dishVOS;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getByCategoryId(dish.getCategoryId());

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
